扭剪型高強螺栓標準規范？
Standard Specification for torsional shear type high strength bolts?
高強螺栓主要應用在鋼結構工程上,用來連接鋼結構鋼板的連接點.高強螺栓的一個非常重要的特點就是限單次使用，一般用于長時間連接，嚴禁重復使用！高強螺栓分類：按受力狀態分為：摩擦型和承壓型；
High strength bolts are mainly used in steel structure engineering to connect the connection points of steel structure steel plates A very important feature of high-strength bolts is that they are limited to single use. They are generally used for long-term connection. Reuse is strictly prohibited! Classification of high-strength bolts: according to the stress state, they are divided into friction type and pressure bearing type;
按施工工藝分為：扭剪型高強螺栓和大六角高強螺栓。
According to the construction process, it is divided into torsion shear high-strength bolt and large hexagon high-strength bolt.
大六角高強螺栓屬于普通螺絲的高強度級,而扭剪型高強螺栓則是大六角高強螺栓的改進型,為了更好施工.高強螺栓的施工需要先初緊后終緊,初緊高強螺栓需用沖擊型電動扳手或扭矩可調電動扳手;而終緊高強螺栓有嚴格的要求,終緊扭剪型高強螺栓需要用扭剪型電動扳手,終緊扭矩型高強螺栓需要用扭矩型電動扳手.
Large hexagon high-strength bolt belongs to the high-strength grade of ordinary screw, while torsion shear high-strength bolt is an improved type of large hexagon high-strength bolt for better construction The construction of high-strength bolts requires initial tightening before final tightening, and the initial tightening of high-strength bolts requires impact electric wrench or torque adjustable electric wrench; The final tightening of high-strength bolts has strict requirements. The final tightening of torsional shear high-strength bolts requires torsional shear electric wrench, and the final tightening of torque high-strength bolts requires torque electric wrench
大六角強螺栓 由一個螺栓，一個螺母，兩個墊圈組成。扭剪型高強螺栓 由一個螺栓，一個螺母，一個墊圈組成。用高強度鋼制造的,或者需要施以較大預緊力的螺栓,皆可稱為高強度螺栓.高強度螺栓多用于橋梁、鋼軌、高壓設備的連接.這種螺栓的斷裂多為脆性斷裂.應用于高壓設備上的高強度螺栓,為了保證容器的密封,需要施以較大的預應力.關于高強度螺栓的幾個概念：按規定螺栓的性能等級在8.8級以上者,稱為高強度螺栓.現標準只羅列到M39,對于大尺寸規格,特別是長度大于10~15倍的高強度螺栓,國內生產尚屬短線.
The large hexagon strong bolt is composed of a bolt, a nut and two washers. Torsional shear high-strength bolt is composed of a bolt, a nut and a washer. Bolts made of high strength steel or requiring large preload can be called high strength bolts High strength bolts are mostly used for the connection of bridges, rails and high-voltage equipment The fracture of this kind of bolt is brittle fracture High strength bolts used in high pressure equipment need to be prestressed to ensure the sealing of the container Several concepts about high strength bolt: according to the regulations, the performance grade of bolt is above grade 8.8, which is called high strength bolt At present, the national standard only lists M39. For large-size specifications, especially high-strength bolts with length greater than 10 ~ 15 times, domestic production is still a short line
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